Apple iPhone 5s 16GB GSM Smartphone - Factory Unlocked by Apple (White/Silver) A7 chip with M7 motion coprocessor,16 GB Storage Capacity (12.2 GB Available) and 1 GB Ram 8MP iSight camera with True Tone flash and 1080p HD video recording Unlocked cell phones are compatible with GSM carriers like ATT and T-Mobile as well as with GSM SIM cards (e.g. H20 and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin. A7 chip with M7 motion coprocessor,16 GB Storage Capacity (12.2 GB Available) Unlocked cell phones are compatible with GSM carriers like ATT and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk and select prepaid carriers). Unlocked cell phones will NOT work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.